But that is distinct from inventing the smartphone. Apple generally doesn't invent things; they let other people invent and pioneer the space, and then they come in with a consumer-focused design and marketing operation to produce luxury products and capture the high end of consumer revenue.
Good for them, and they've been richly rewarded for it. But let's not pretend that we should think like 7 year olds just so we can avoid being accurate about who invented what.